Mechanical properties enhancement and microstructure study of Al-Si-TiB2 in situ composites

7th National Conference on Processing and Characterization of Materials

Sahoo, S.K.^1 ; Majhi, J.^1 ; Pattnaik, A.B.^1 ; Sahoo, J.K.^1 ; Das, Swagat^1

Department of Metallurgical and Materials Engineering, Indira Gandhi Institute of Technology, Sarang Odisha

759146, India^1

关键词: Conventional casting;    In-situ composite;    In-situ techniques;    Mechanical properties enhancements;    Metal reactions;    Reinforced particles;    Wear and corrosion resistance;    Wear properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012060/pdf
DOI  :  10.1088/1757-899X/338/1/012060

来源: IOP

【 摘 要 】

Al-Si alloy-based composite is one of the most promising MMC materials owing to its outstanding mechanical properties, wear and corrosion resistance, low cost and ability to be synthesized via conventional casting routes. Challenges in achieving clean interface between reinforced particles and matrix alloy have been overcome by means of in-situ techniques of fabrication. Present investigation is concerned with synthesizing Al-Si-TiB2in-situ composites through stir casting route using K2TiF6and KBF4halide salts for exothermic salt metal reaction. X-Ray diffraction analysis revealed the existence of TiB2in the prepared samples. Effect of TiB2in-situ particles in the Al-Si base alloy has been investigated from the results obtained from optical microscopy as well as SEM study and wear analysis with a pin on disc wear testing apparatus. Improved hardness and wear properties were observed with addition of TiB2.